Just realized in the pictures I posted the slosher tray is missing the lifting handles which I hadn't installed yet. But you get the idea - you just move the slosher from tray to tray during processing: put the film in the slosher, the slosher goes into the developer tray, after development, just lift the slosher out and move it to the stop bath etc. Washing is straight forward, I just put the slosher in a tray with the old Kodak siphon going (same as washing prints in a tray).
I don't want to give the impression tray shuffling is bad. The slosher is just an option, and there is nothing wrong with shuffling. Plenty of great photographers did it that way and people are still doing it with excellent results.